Shoe-finishing machine



Dec. "4 1923. 1,476,196

s. A. DOBYNE SHOE FINISHING MACHINE Filed Jan. 20. 1922 I, u E 3/6 575F605 A 00a Y/YE) Patented Dec. 4, 1923.

UNITED STATES 1,475,1tlfi PATENT OFFICE.

STEPHEN A. DOBYNE, OF ST. LOUIS, MISSOURI, ASSIGNOB TO CHAMPION SHOE MA- CHINERY COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

SHOE-FINISHING MACHINE.

Application filed January 20, 1922. Serial No. 530,552.

To all whom it may concern:

Be it known that I, STEPHEN A. DOBYNE, a citizen of the United States, and residing at St. Louis, Missouri, have invented the new and useful Improvement in Shoe-Fin ishing ldachines, of which the following is a specification.

This invention relates to finishing machines, and more particularly to the dust collecting devices therefor.

In most machines of this kind a finishing element, usually of the rotary type, is enclosed in a hood or housing connected with a duct which in turn is connected with a system from which the air is exhausted, so that a draft of air may be induced into the open end of the duct at the finishing element. By this means, the dust produced by the finishing operation is caught in the draft and conveyed by means of said ducts to a suitable collecting receptacle. The open end of the duct being large enough to contain the finishing element, is usually so large that the rate of movement of air thereinto, or in other words, the strength of the draft available for collecting the dust is greatly reduced.

One of the objects of this invention, therefore, is to provide means whereby the dust collecting draft of air will be concentrated so as to strengthen the draft and direct it at a point most effective for collecting the dust projected from the finishing element.

Another object of this invention is to provide such means for concentrating the draft, together with means for collecting such additional dust as may settle in the chamber containing the finishing element.

Another object of this invention is to pro vide the above-mentioned improvements in dust collecting devices of such construction as not to interfere with the proper operation and adjustment of the finishing element.

Further objects will appear from the detail description taken in connection with the accompanying drawing, in which:

Figure 1 is a detail view in side elevation of the finishing element of a shoe finishing machine provided with dust collecting means embodying this invention; and

Figure 2 is a front elevation of the apparatus of Figure 1.

In the accompanying drawing a shoe finishing machine has been taken for illustration. This may comprise a frame consistmg of two or more end brackets 1 connected by one or more cross members 2 adapted to form the frame of a machine and also to support the various parts, such as the housing for the finishing elements. The finishing elements may be mounted on a shaft 3 suitably driven by driving mechanism, not shown. The finishing element a may be of any suitable type, that shown being a sanding wheel for a shoe finishing machine.

The finishing element 4; may be enclosed in a hood or housing 5 suitably supported on the cross-member 2 and connected with a duct 6, communicating with a drum 7 from which the air may be exhausted by any suitable means, not shown. The lower part of the exhaust duct 6 extends forwardly beyond the center of the wheel 4 so as to have its mouth or ingress opening at the end 8 disposed in the path of the particles projected from the element lduring the finishing operation. This opening is wider than the wheel so as to accommodate a large volume of air, and to broaden the zone from which dust may be collected. It will be understood that during such operation the element l rotates in the direction indicated by the arrow in Figure 1 and the dust partielse being projected tangentially therefrom, will be thrown toward the end 8 of the duct. This end is formed radially of and adjacent the periphery of the wheel 4, the lower edge projecting somewhat beyond the center of said wheel so as to facilitate entrance of the dust particles thereto and to extend the region of concentrated draft forwardly toward the working zone of the tool.

Suitably pivoted at 9 and within the duct 6 is partition 10 comprising a plate extending horizontally across the duct 6 and terminating close to the end 8 and approximately adjacent the element a. The plate 10 is spring-pressed by a spring 11 against a stop 12, so as to properly position it with respect to the element l and at the same time to allow it to yield to downward displacement in order to facilitate removal or adjustment of the element 4. The pivot 9 is located so as to provide a small gap 13 between the rear edge of the partition 10 and the upper wall or housing of the ex haust duct 6. This is to provide for the collection of such dust as may settle. above the partition 10 by means of a slight draft of air which will continually be flowing through the gap 13 and into the duct 5 while the machine is in operation.

By means of the partition 10 the casing 01' housing 5 is divided into a major duct 14 below this partition and extending in a substantially straight line between it and the lower wall of the duct 6, and a chamber for the finishing element 4: located above the partition. A minor duct leads from this chamber, through the gap or throat to the exhaust duct 6. On account of the smallness of the gap 13, practically all of the draft induced will be concentrated in the duct 14, whose inlet the end S is disposed adjacent the worsnengaging zone of the wheel 4:, so that the dust particles projected from that wheel during the finishing operation will be caught by the strong draft and carried into the duct 14. It has been found in practice that this device so concentrates the draft into the duct 1% that practi cally all of the projected dust particles are caught and carried into said duct, and in addition, the power required for inducing the draft is greatly reduced. This concentrated draft together with the fact that the inlet of the duct 14 is positioned adjacent the work-engaging zone of the element 4, is wider than that element and is faced in a direction opposite to the movement thereof, rendersit practically impossible for any of the dust to escape.

In accordance with this invention the dust collecting device is o constructed as to provide for a large volume of air sweeping past the tool so as to insure the passage of the dust intothe exhaust connection. F or this purpose the dust hood base part providing an ingress opening displaced radially with respect to the tool and connected by major duct leading to the exhaust connection, while this major duct has a relatively large egress opening to the exhaust connection. The duct leading from the perip ery of the tool has, however, a relatively small egres opening to the exhaust connection. The draft is accordingly concentrated in the inaj or duct which extends in a ubstantially straight line from its large ingress opening to the exhaust connection; while the egress opening of the minor duct is to one side ot the partition dividing the ducts. The minor duct leading from the periphery of the wheel forms, in fact, sinioly a dust collecting chamber, in which the draft is simply sutlicient to keep the dust therein, any accumulation being discarded by vibration of the movable partition. With this arrangement the draft is, therefore concentrated and applied in a large volume at the point where it will be most effective to catch the tangentially flying particles, while dissipat'ion of the draft through spaces between from the part enveloping the tool.

It is obvious that various changes may be made in details of construction without (16- parting from the spirit of this invention; it is, therefore, to be understood that this in vention is not to be limited to the specific details shown and described.

Having thus described the invention, what is claimed is:

1. In a shoe finishing machine, the combination with a rotary finishing tool, of a dust hood partially enveloping said tool and having a part providing an in ress opening displaced radially with respect to said tool, a partition dividing said hood into a major duct leading from said ingress opening and a minor ductleading from the periphery of said tool, and an exhaust connection to said ducts and providing a relatively large egress opening from Said major duct and a rela tively small egress opening from said minor duct.

2. In a shoe finishing machine, the combination with a rotary finishing tool, of a dust hood partially enveloping said tool and hav ing a part providing an ingress opening wider than and displaced radially with respectto said tool, a partition dividing said hood into a major duct leading from said ingress opening and a minor duct leading from the periphery of said tool, and an exhaust connection to said ducts and provid ing a relatively large egress openingfrom said major duct and a relatively small egress opening from said minor duct.

8. In a shoe finishing machine, the combination with a rotaryfinishing tool, of a dust hood partially enveloping said tool and havinga part providing an ingress opening displaced radially with respect to said tool, a partition dividing said hood into a major duct extending in a substantially straight line from said ingress opening and a minorduct leading from the periphery of said tool, and an exhaust connection to said ducts and providing relatively large egress opening from said major duct and a relatively small egress opening from said minor duct.

4;. In a shoe finishing machine, the combination with a rotary finishing tool, of a dust hood partially enveloping said tool and having a part providing an ingress opening widerthan and displaced radially with respect to said tool, a partition dividing said hood into a major duct extending ina sub stantial'ly straight line from said ingress opening and a minor duct leading from the periphery of said tool, and an exhaust connection to said ducts and providing a relatively large egress opening from said major duct and a relatively small egress opening from said minor duct.

5. In. a shoe finishing machine, the combi- .cted port, which restricts the fiow of air nation with a rotary finishing tool, of a dust hood partially enveloping said tool and having a part providing an ingress opening displaced radially with respect to said tool, a partition dividing said hood into a major duct leading from said ingress opening and a minor duct leading from the periphery of said tool, an exhaust connection to said ducts and providing a relatively large egress opening from said major duct and a relatively small egress opening from said minor duct, and means for mounting said partition for movement substantially as and for the purpose set forth.

6. In a shoe finishing machine, the combination with a rotary finishing tool, of a dust hood, an exhaust connection thereto, said hood having a part partially envel0p ing said tool and having a part providing an ingress opening of relatively large area displaced radially with respect to said tool, and a partition dividing said hood and proriding a major duct leading from said ingress opening to said exhaust connection and providing a dust collecting chamber on the other side of said partition.

7. In a shoe finishing machine, the combination with a rotary finishing tool, 01"" a dust hood, an exhaust connection thereto,

said hood having a part partially envelop- Y ing said tool and having a part providing an in 'ress opening of relatively large area displaced radially with respect to said tool, and a partition dividing said hood and providing a major duct leading from said ingress opening to said exhaust connection and adapted to restrict the flow of air from said enveloping part in order to concentrate the draft in said major duct.

8. The combination with a rotary finishing tool, its hood. and exhaust means there for, of a duct connecting the hood and the exhaust means, a partition pivoted in the duct and extending parallel to its walls, with its free end so located as to form a minor inlet passage between the same and the tool and a major passage between the same and the duct wall.

In testimony whereof I aflix my signa ture this 7th day of December, 1921.

STEPHEN A. DOBYNE, 

